Which app is best for free international calls?

How to Make Free International CallsSkype. Skype is a free app for Android, Apple, and Windows devices. WhatsApp. Another commonly used app is the Facebook-owned WhatsApp. FaceTime. If youre connecting to another Apple user, you can use the built-in FaceTime app. Viber. Rebtel. IMO. PopTox. LINE.More items •25 Jul 2021